Chimney-top.



E.P. D 0TY. CHIMNEY TOP. APPLICATION IILBD D30. 26. 1906.

I PATENTED SEPT. 3, 1907 202'392esses.

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UNITED STATES ELLSWORTI-I P. DOTY, OF MERIDIAN, NEW YORK.

CHIMNEY-TOP.

Specification of Letters Patent.

Patented Sept. 3, 1907.

Application filed December 26, 1906. Serial No. 349,395.

To all whom it may concern:

Be it known that I, ELLSWORTH P. DOTY, of Meridian, in the county ofCayuga, in 'the State of New York, have invented new and usefulImprovements in Chimney- Tops, of which the following, taken inconnection with the accompanying drawings, is a full, clear, and exactdescription. f

This invention relates to certain improvements in chimney-tops orextensions and refers more particularly to a flue-extension having anoffset-flue open at the top and bottom at one side of the main flue withwhich it communicates for the purpose of'relieving the main flue fromback-drafts or down currents, and at the same time permitting the escapeof the products of combustion, as smoke, either through the top orbottom of the offset-flue.

The offset of the chimney-top is necessarily at one side of the mainflue of the chimney and the extension is, therefore weighted, oroverhalanced toward the side of the offset tending to tilt thechimneytop downwardly in the direction of such offset.

' One of the essential purposes, therefore, of my present invention isto provide adjustable means co-acting with the inner side of thechimney-flue to counter-act this tendency to tilt or rather tocounteract the extra weight of the extension at one side of the axis ofthe main flue.

Other objects and uses relating to the specific structure of thechimney-top and its retaining means will be brought out in the followingdescription.

In the drawingsFigure 1 is a top plan of my improved chimney-top shownas operativcly mounted upon a chimney. Figs. 2 and 3 are sectional viewstaken respectively on lines 22, Fig. 1 and 33, Fig. 2. Fig. 4 is aninverted plan, in perspective, of the base of the chimney-top. Fig. 5 isan enlarged detail sectional view taken on line 55, Fig. 1. Fig. 6 is aperspective view of the detached bracket or retainingbar for thechimney-cap.

My improved chimney-cap is adapted to be mounted upon the top of asuitable chimney, as -a-, having a llue a, said cap being preferablymade of cast iron or equivalent metal and consists of a base-section 1-and an angular flue section comprising two upright portions 2 and 3-.

The base-section 1 preferably consists of an open frame made in onepiece and slightly larger in its outer din'lensions than the crosssectional area of the flue aand is adapted to rest upon the top of thechimney -u with its central opening registering with the upper end ofthe fine a. These fines are usually made rectangular in cross sectionand the base -1 is also rectangular in top plan and comparativelyshallow vertically so as to form a convenient supporting base for theangular extension 2 and -3, the

opening through said base being, in this instance, oval or oblong, asbest seen in Fig. 4-.

The opposite sides of the open frame or base 1- are tied together byintegral transverse bars lwhich are parallel and spaced apart a slightdistance forming an intervening transverse slot or elongated opening 5for the reception of one end of an adj ustable bracket or retaining bar-6, presently described. These bars 4 are offset laterally near one enda greater distance apart than the remaining portions of the bars so asto form an enlarged socket 7.in one end of greater transverse width thanthat of the slot --5 to permit the insertion and removal of theadjustable bracket 6 into and out of operative connection with the bars-4, as will be hereinafter more fully described. The plate -1 may besecured to the top of the chimney in any well known manner, andconstitutes a convenient means for holding the top bricks of the chimneyfrom loosening, but its essen tial use in this particular case is toafford a convenient means for attaching the extension to the chimney andfor receiving the bracket 3 which holds the extension in operativeposition. This bracket -*(3 consists of a comparatively long bar of castiron or similar metal of substantially the same transverse width orthickness as the slot -5 in which it is adjustable, the upperend of saidbar being widened to form oppositely projecting lugs or bearings 9 ofgreater transverse width than the slot 5-', but of slightly lesstransverse width than the socket '7- at one end of the slot so as topermit this end of the bar to be inserted from the bottom upward throughthe socket -7 to bring the lugs or projections -9 into registration orengagement with the upper edges of the bars 4-wheu the bracket 6 isadjusted lengthwise of the bars 4 from the socket -7-. This bracket "(5-is also provided with a laterally projecting arm -10 sliding in the slot5- and having opposite laterally projecting shoulders 11- in a planebelow the shoulders 9- for engagement with the underside of the bars -4,as best seen in Figs, 2 and 3.

It will now be seen upon reference to Fig. 2 that the shoulders '.9- and11* engage respectively the upper and lower edges of the bars *-4-.- indifferent vertical planes, one in advance of the other lengthwise of theThe bracket -'6 is assembled upon the plate or base 1 before the latteris placed upon the chimney and as soon as the base 1-- is properlyregistered with the flue a the bracket G- is adjusted so that itsdepending arm engages the inner face of one side of the flue a; that is,one edge of the bracket 6- is brought against the inner side of thechimney some distance from the top or plate 1-, the shoulders 11engaging the underside of the plate -1 or bars 4- some distance inwardlyfrom the vertical plane of contact of the lower end of the bracket Gwith the inside of the chimney and toward the weighted side 3 of theextension 2. This adjustment of the bracket 6 is usually made before theextension 2 is placed upon its base 1, that is, the base is securelylocked in place by the bracket G and then the extension 2 is secured tothe base lby suitable clamping bolts 12, as best seen in Figs. 1 and 5.These upright extensions 2- and 3 are preferably made in sections forconvenience of casting, being divided vertically through the rlongitudinal centers and having their meeting edges provided withlapping joints, as best seen in Fig. 3, the opposite sections beingdrawn together by one or more clamping bolts 13 located preferably atthe junction of the uprights 2 and ,3 and are further held together bythe one-piece base-plate 1 and clamping bolts 12.

The upright portion 3 communicates through a branch passage -14- withthe lower upright 2 and is formed with a vertical opening 15- extendingtherethrough from top to bottom and terminating in planes above andbeneath the branch passage l4 so as to afford a direct vertical passageat one side of the flue a for back-drafts or down currents of air,thereby preventing such back-drafts or down currents from entering thechimney flue.

The base-plate l and bracket 6 are first assembled in the mannerpreviously described, after whichthe base-plate is placed upon the topof the chimney with the bracket 6 depending into the flue a, saidbracket being adjustable lengthwise in the slot-5 until its outer edgeor lower end comes in contact with one side of the flue, the shoulders 9and 11 engaging respectively the upper and lower edges of the bars 4 atdifferent distances from the vertical plane of the side of the fluewhich is engaged by the bracket. The flue extensions 2 and 3 which aredivided vertically through their longitudinal centors are then placedupon and secured to the base-plate -1 by the bolts 12-; that is, thebase of the lower flue 2 is secured to the base plate 1 while the upperflue portion 3 is offset to the side of the flue opposite to that whichis engaged by the bracket 6-, thus producing an over-balancing weight atone side of the extension tending to tilt the extension and its base 1upon the adjacent edge of the base-plate, but such tilting tendency iscounter-acted by the bracket 6 engaging the adjacent side of the flue orchimney 'a.

By extending the upright flue 3 above and below the branch l4- leadingfrom the lower portion -2- of the chimney top and leaving the oppositeends of such upright 3 open at the bottom as well as at the top, it isobvious that any down current of air entering the top of the extension 3simply passes out through the bottom of such upright 3, thereby creatinga draft past the branch opening 14 which draws the smoke upwardly anddownwardly through the lower upright 2 and from the chimney, thuspreventing back-draft through the chimney.

What I claim s:

1. A chimney top comprising a base-frame mounted on the top of thechimney around its flue and provided with a transverse slot, a brackethaving one end adjustahly connected to and interlocked with the sides ofthe slot, and its other end depending into and engaging one side of thechimney-flue, a tubular extension secured to the base-frame and having alateral passage, a second extension integral with the first namedextension and provided with a vertical opening therethrough at one sideof the opening in said first-named extension and communicating with thelateral passage.

2. A chimney-top having two intercomiuunieating passages disposed sideby side in different vertical planes,'

one of the passages being open at the top and bottom, and a bracket inthe lower end of the other passage adjustahly interlocked with thechimney-top and engaging the inner side of the chimney-flue.

In witness whereof I have hereunto set my hand this 18th day of December1906.

ELLSWORTH I. DOTY.

Witnesses Dona Q. DOTY, HOMER E. DOTY.

